Figure 4
The line chart titled “Documents by year” shows the number of documents across years. The horizontal axis is labeled “Year” and displays the labels “2015”, “2016”, “2017”, “2018”, “2019”, “2020”, “2021”, “2022”, and “2023”. The vertical axis is labeled “Documents” and shows values from 0 to 50 in increments of 10. The plotted line connects data points marked for each year. The line starts at the coordinate (2015, 1), moves to (2016, 0), then rises to (2017, 8), slightly drops to (2018, 6), sharply increases to (2019, 30), continues to (2020, 32), slightly decreases to (2021, 31), slightly decreases further to (2022, 30), and finally rises to (2023, 43). Note: All numerical data values are approximated.Industry 4.0 and e-commerce trend